Abstract: This study explores the characteristics and development value of associated sedimentary lithium resources in bauxite,analyzes the principles,advantages,disadvantages and economic efficiency of existing extraction technologies,evaluates their development and utilization prospects,and provides a theoretical basis for the efficient and comprehensive utilization of aluminum-lithium resources. By sorting out the occurrence state,distribution law and ore-forming influencing factors of lithium resources in bauxite,the study conducts a comparative analysis of the process principles and application limitations of single lithium extraction technologies such as alkaline leaching,acid leaching,and roasting-acid leaching. Combined with the process logic of mineral processing-metallurgy integrated technology,a systematic evaluation is carried out from the dimensions of resource utilization efficiency,cost-effectiveness and environmental impact. The results showed that lithium is mainly enriched in the low-grade bauxitic rocks and clay rocks at the top and bottom of the bauxite orebody,and its occurrence state and distribution law are regulated by diagenetic-mineralization processes and secondary transformation processes. Single lithium extraction technologies (including alkaline leaching,acid leaching,and roasting-acid leaching) have problems such as substandard quality of aluminum concentrate,low comprehensive utilization rate,and unrecovered associated elements (gallium,scandium and so on),leading to poor economic and environmental benefits. In contrast,the coordination of mineral processing and metallurgy processes enables the simultaneous extraction of aluminum concentrate and enrichment of lithium,reducing the generation of waste residues as well as lowering energy consumption and costs. The associated lithium resources in bauxite constitute a potential large-scale sedimentary lithium resource pool and hold significant development value. In the future,it is necessary to promote the coordinated development of aluminum-lithium resources by deepening research on the lithium occurrence mechanism, optimizing the mineral processing-metallurgy integrated process,and conducting economic and environmental impact assessments. This will help broaden the supply channels of lithium ore resources in China and realize the integration of resource benefits and ecological benefits. 

Key words: bauxite,deposited lithium resources,beneficiation-metallurgy combination,comprehensive utilization